Q1: A 68 kg sprinter starts a race with an acceleration of 5.8 m/?. What is the magnitude of the net external force on him in N?

Q2: A cleaner pushes a 4.1 kg laundry cart in such a way that the net external force on it is 58 N. Calculate the cart's acceleration in m/s?.

Q3: A person is moving the mover, the net external force on the 24 kg mower is known to be 51 N. (A) If the force of friction opposing the motion is 29 N, what force F (in newtons) is the person exerting on the mower? (B) Suppose the mower is moving at 1.6 m/s when the force F is removed. How far will the mower go before stopping in m?

Q4: A powerful motorcycle can produce an acceleration of 3.8 m/s? while traveling at 90 km/h. At that speed the forces resisting motion, including friction and air resistance, total 400 N. (Air resistance is analogous to air friction. It always opposes the motion of an object. What is the magnitude of the force which the motorcycle exerts backward on the ground to produce its acceleration if the mass of the motorcycle with rider is 260 kg?

Q5: A bullet with a mass of m = 15.5 g is shot out of a rifle that has length L = 1.04 m. The bullet spends t = 0.17 s in the barrel.

a) tell an expression, in terms of the given quantities, for the magnitude of the bullet's acceleration, a, as it travels through the rifle's barrel. You may assume the acceleration is constant throughout the motion. (B) Calculate the numerical value for the magnitude of the bullet's acceleration, a in m/s?. (C) What is the numerical value of the net force Fnet in newtons acting on the bullet?

Q6: A 1020 kg artillery shell is fired from a battleship. While it is in the barrel of the gun, it experiences an acceleration of 2.9 x 104 m/S^2. (A) What net force is exerted on the artillery shell before it leaves the barrel of the gun (in Newtons? (B) What is the magnitude of the force exerted on the ship by the artillery shell in Newtons?